The effect of smoothing by spectral dispersion on laser scattering and beam propagation in large-scale-length plasmas relevant to National Ignition Facility hohlraums

Details The effect of smoothing by spectral dispersion on laser scattering and beam propagation in large-scale-length plasmas relevant to National Ignition Facility hohlraums The effect of smoothing by spectral dispersion on laser scattering and beam propagation in large-scale-length plasmas relevant to National Ignition Facility hohlraums

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aps..dpp..4e02m&link_type=abstract

American Physical Society, Division of Plasma Physics Meeting, November 10-15, 1996, abstract #4E.02

Physics

Plasma Physics

Scientific paper

We have used homogeneous plasmas of high density (up to 1.5 10^21 electrons per cm^3) and temperature ( ~ 3 keV) with large density scalelengths ( ~ 2 mm) in order to approximate conditions within National Ignition Facility (NIF) scale hohlraums. Low-Z gasbag plasmas were used to emulate the uniform low-Z plasma filling most of the ignition-scale hohlraum. Smaller, Nova-scale, hohlraums were used to replicate the shelf of gold that is ablated from the wall of the NIF hohlraum, in which the highest growth of SBS is expected to occur. The plasmas were formed with nine of the Nova beams while a tenth beam was used as an interaction beam, at the NIF relevant laser intensity (f/8, 3ω at 2 x 10^15 Wcm-2). The effect of smoothing the interaction beam by spectral dispersion (SSD) on SBS and SRS, and the transmitted beam characteristics, will be discussed.

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